Query for element of array in JSON column

Question

Recently upgraded to using PostgreSQL 9.3.1 to leverage the JSONfunctionalities. In my table I have a json type column that has a structure like this:

{
   \         


        

Answer 1

Yes, that's possible:

SELECT *
FROM   tbl t, json_array_elements(t.json_col->'emails') AS elem
WHERE  elem->>'id' = 123;

tbl being your table name, json_col being the name of the JSON column.

More details in this related answer:

• How do I query using fields inside the new PostgreSQL JSON datatype?

More about the implicit CROSS JOIN LATERAL in the last paragraph of this related answer:

• PostgreSQL unnest() with element number

Index to support this kind of query:

• Index for finding an element in a JSON array